Well, it isn't supposed to smell bad, at least not before a long day. In theory the smell should be at least subconsciously attractive, if evolutionary psychology is anything to go by.

The point is that most women will suffer from parasitic infection or the like at some point of their lifes, and the deal - most would agree - is to keep such episodes to a minimum. Sleeping without panties (keeping it as ventilated as possible) and keeping it shaven or trimmed do help a lot.

As for men, do the tongue test if you are in doubt the pussy is healthy or no - it should taste like a bloodless, wet wound if everything is alright. 

Two things:  How the hell would I know what a bloodless, wet wound tastes like?  I'm not a zombie (yet)!  And what if it doesn't taste like a bloodless, wet wound?  What if it tastes like fried chicken (for example)?  At that point, it's too late!!  There's gotta be a better test.....

*goes to the lab*

You know when you get blisters right?

You know when they kinda pop and the skin comes off right?

You know how its kinda sore and tender but it's moist right?

Have you ever licked it to see what it tasted like?